<template>
  <div class="todo-footer">
    <label>
      <input :checked="isChecked" type="checkbox" @change="changeAllDone">
    </label>
    <span>
          <span>已完成{{ dones }}</span> / 全部{{ list.length }}
    </span>
    <button class="btn btn-danger" @click="deleteAllObj">清除已完成任务</button>
  </div>
</template>

<script>
export default {
  name: "MyFooter",
  data() {
    return {
      // isChecked:""
    }
  },
  props: ["list"],
  methods: {
    deleteAllObj() {
      let status = this.list.some(a => {
        return a.done == true
      })
      if (status == true) {
        let c = confirm("你确定要删除吗?")
        if (c) {
          this.$emit("deleteAllObj");
        }
      } else {
        alert("你一个都没完成哦！")
      }
    },
    changeAllDone(event) {
      this.$emit("AllDoneChecked",event.target.checked);
    }
  },
  computed: {
    isChecked:{
      get(){
        return this.list.length==this.dones?true:false;
      }
    },
    dones() {
      var count = 0;
      this.list.forEach((a) => {
        if (a.done == true) {
          count++
        }
      })
      return count;
    }
  },

}
</script>

<style scoped>
/*footer*/
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}
</style>
